Governor for fluid-pressure mechanisms



Aug. 28, 1923. 4 I 1,466.399

. R. HUDSON ET AL GOVERNOR FOH FLUID PRESSURE MECHANISMS Filed May 27.1920 Patented Aug, 28, 1923,

warren stares are? or BAY HUDSON, or waiinutriarnen, ARKANSAS, RICHARDw. Henson AND FRANK n.

Henson, or POPLAR BLUFF, Missotmr GOVERNOR- FOR FLUID-PRESSUREI'llECHANISIVIS.

Application filed May- 1920. Serial No. 384,749.

To (iZZ 1 37i cm 2'1? 727 a. can C em 7' it known that, we, RAY,iiUDSON,

RICHARD lV. HrmsoN. and FRANK N. HunsoN, citizens of the United States,respectivel residing at Walnut Ridge, Arkansas, and Poplar Bluff,Missouri, have invented certain w and useful Improvements in Governorsfor Fluid-Pressure Mechanisms,- of which the following is specification,

reference being had therein to the aecom panying drawing. 1

Our invention relates to mechanisms suchas brakes and rams for hoistingrigs that are operated by fluid pressure, such as an. or steam, and our01)]6Ct is to provide an:

automatically acting device to control the how 01": pressure fluid, sothat it will cause the part or member to be moved easily and smoothlywithout and jerking or racking strains and without impairment ordiminu-- tioii ot' the force or power that it is desired shall finallybe exerted by such part or member and to this end our inventionconsistsin the governor or power regulating:

device constructed substantially asdetined j by or included within thescope or language I of the appended claims.

in the accompanying drawings Fig. 1 is a longitudinal section ofagoveriior illus trating one embodiment and application of ourinvention; Fig. 215 a top plan v ew.

showing a hoisting rig embodying our invention.

said boiler. The pipe 10 is connected with the interior 01 a valve chest12 that has an,

outlet port 13 leading; to an adjacent cylinder 14. and controlled by anordinary slide valve 15. lVithin the cylinder is a'piston 16 thatengages the cylinder walls with a steam tight joint. The pipe 11 to theram is connected with the cylinder 14 at a point that is never crossedby the piston 16 so that at all times there may be a free flow of steamfrom the port 13 to the pipe 11. The piston is limited in its movementtowards port 13 and the pipe 11 by a preferably adjustable stop whichmay be a bolt or screw 17 passing through a threaded hole in thecylinder head 18. On the side opposite the stop the piston has a pistonrod 19 which passes through the otherrcylinder head 20 and outside thelatter is con-- nected with the slide valve so that movement of'thepiston 16 outward Will result in proportionate movement of the slidevalve to increase the openingof the port 13. The lever 21' is pivotedbetween its ends to a bracket 23 fixed to the cylinder head'20., Suchoutward movementoit' the piston which results in increasing theopeningof the port 13 is caused by pressure in the cylinder upon the side ofthe piston towards the port 13. Movement of the piston in the oppositedirection, and consequent closingniovement or the slidevalve, isproduced by a spring 24 which is shown as placed ipon the piston r d sothat it bears at one end upon the piston and at itsother end upon .anadjustable nut 25 that passes through a threaded hole in the cylinderhead 20 and-which is made tubular for the'passage through it of thepiston rod 19.

I The slide valve 15 is so adjusted as to give a lead or opening of thethat whenever the throttle (notshown) that controls the How of steamthrough the pipe 10 isopen steam may always pass from the valvechest andinto the eylin'der 14 and thence thruthe pipe 11 t-o'the-ram. y In Fig.218' shown enough of a hoisting rig to illustrate our invention appliedthereto, there, being an engine 26 geared to a: shaft, 27, onwh ch isloosely mounted a drum, 28, for a hoist-ingcable, 29, a clutch 30, beingprovided to connect and disconnect drum and shaft, the clutch beingoperatively connected with the ram, 31, to which steam issupplied frompipe, 1 1, from the cylinder,

14, of the governor; h i 7 It will be seen that by ,means of ourinvention when the throttle is opened the full force of the stea-iiiwill not'be at once exerted on the ram because on' entering the cylinderlithe piston 16 will move outward so that some of the energy is exertedin that way, and the increasing resistance of the rain as it moves underthe power of the steam results in further outward movement of the piston16 which being accompanied by a progressive opening of the port 13 addsto the volume of steam entering the cylinder 14 and effectively actingon the ram so that by the time a maximum force is to be exerted steam issupplied in maximum volume.

The rams of hoisting? rigs operate the port 18 so 1 clutches and brakesthereof. It the clutches are thrown on quickly so that the full power ofthe steam engine or other motor for run ning the hoisting cable or othermember of the machine is instantly applied there is great danger whichamounts almost to certainty that the cable or other part of the machinethat is power operated will be broken. By our invention it is impossibleto throw the full power of the motor on. the clutch at once'because byour control device the power tomove the ram piston is gradually appliedand at such a rate as to make damage to the driven parts impossible.

As we have already indicated our invention is applicable to air brakesand any other fluid pressure apparatus in which it is de sirable. toregulate the volume of fluid be tween the time of opening the throttleuntil the time it is desired to exert a maximum. pressure.

- Nhat we claim is:

r 1., In means fcrcontrolling the applicaactuated mechanism, andautomatic means in the pathot power from such source to said'powerdevice so constructed when power is initially obtained fro'msuch sourceto deliver substantially less than the maxinuun power to said. deviceand incapable of acting to deliver initially more than substantiallyless than the maximum power and thereafter gradually to increase therate of delivery of power to said device.

2. In means for controlling the applica tion of power to a memberinterposed be-- tween a motor and the mechanism to be ac- .tuated by themotor, the combination of a powerdevicefor actuating said member, a

source of maximum power under manual power torsaid device and incapableof acting ,portleading from such chamber and a valve for such port thatnormally nearly closes the port.

3. In means for controlling; the application of power to a memberinterposed be tween a motor and the mechanism, to be ac tuated by themotor, the combination of power device for actuating said member, asource of maximum, power under manual control, and automatic means inthe path or power from such source to said power do vice constructedwhen power is initially 'obtained from such source to deliversubstantially less than the maximum power to said device and thereaftergradually to increase the quantity of power delivered to said device,said automatic means including valve chamber, a port leading from suchchamber, a valve for such port that normally nearly closes the port, acylinder into which such port opens said cylinder having an outlet port,a piston in the cylinder, and conned tions between the oiston and thevalve b which movement of the piston acts to move the valve toincreasingly open the valve con trolled port as the piston moves underpres sure in the cylinder.

4.. Mechanism using fluid pressure having interposed between. the sourceof 'iressure' and thepoint otapplic ation thereof. a regulating devicecomprising a valve chamber having an inlet port and an outlet port, avalve that coacts with the outlet port, a cyl inder into which saidoutlet port leads, said cylinder having an outlet, a piston in saidcylinder movable in one direction by pres sure from the valve chamber,and an operative connection between the piston and the valve thatimparts such movement of the piston to the valve in the direction toincrease the extent of, opening, of'the valve chamber outlet port. V Intestimony whereof we hereunto affix our signatures.

' RAY HUDSON.

RICHARD W. HUDSQN.

FRANK N. HUDSQN.

